HP-1751 added BillingRegistry::getTariffTypeDefinitions() method

Author: VadymHrechukha

src/product/BillingRegistry.php

@@ -3,10 +3,8 @@
 namespace hiqdev\php\billing\product;
 
 use hiqdev\php\billing\product\behavior\InvalidBehaviorException;
-use hiqdev\php\billing\product\Domain\Model\TariffTypeInterface;
 use hiqdev\php\billing\product\Exception\AggregateNotFoundException;
 use hiqdev\php\billing\product\Exception\BillingRegistryLockedException;
-use hiqdev\php\billing\product\Exception\TariffTypeDefinitionNotFoundException;
 use hiqdev\php\billing\product\invoice\InvalidRepresentationException;
 use hiqdev\php\billing\product\invoice\RepresentationInterface;
 use hiqdev\php\billing\product\price\PriceTypeDefinition;
@@ -183,14 +181,15 @@ public function getAggregate(string $type): AggregateInterface
         throw new AggregateNotFoundException('Aggregate was not found');
     }
 
-    public function findTariffTypeDefinition(TariffTypeInterface $tariffType): TariffTypeDefinitionInterface
+    /**
+     * @return \Generator
+     * @psalm-return \Generator<TariffTypeDefinitionInterface>
+     */
+    public function getTariffTypeDefinitions(): \Generator
     {
         foreach ($this->tariffTypeDefinitions as $tariffTypeDefinition) {
-            if ($tariffTypeDefinition->tariffType() === $tariffType) {
-                return $tariffTypeDefinition;
-            }
+            // TODO: endure that it would not be changed
+            yield $tariffTypeDefinition;
         }
-
-        throw new TariffTypeDefinitionNotFoundException('Tariff type definition was not found');
     }
 }